The Heureka Research Programme - Mistra

Field trials in the project Data acquisition for operational planning. To the left planned harvestingareas in Strömsjöliden, Västerbotten. An application for FcGIS was developed to assist theoperator to register tree identification numbers on the sample-plots (right, from Remningstorp,Västergötland).single trees have to be registered during harvesting, which is not done by harvesterstoday. Results from a first study, hosted by SCA, were presented at twoscientific conferences (Wallerman et al. 2008, Moberg et al. 2008). Resultsfrom a second study at Vindeln Experimental Forests are presented in theMaster’s thesis by Larsson (2009). At a sub-stand level DBH and tree heightwere estimated with RMSEs of 1.7 cm (8.4%) and 0.7 m (5.2%) , respectively.The stem volume was estimated with a RMSE of 25 m 3 ha -1 (10.5%). Examplesof the diameter distribution at the plot-level for two field-plots are presentedin Fig. 24. Further results will be presented in a forthcoming scientificpaper (Holmgren et al. 2009).Figure 24. Comparison of density plots between imputed diameters and reference diameters forplots 5.3 and 11.1. at Vindeln Experimental Forests in Strömsjöliden. From Larsson (2009).81